Joule Thief

[Mk1]

@Jeanna

So i guess you are not going to try like i told you.

In that case i am wasting my time here.

If you connect 2 coils in series you are sending energy back in the second toroid , more juice in the toroid , changes the base coil reaction and changes the freq.


@all

700 pages , nice !

Gadget doesn't seem so sick , he took time make fun of me . Take care anyway.

Mark

[jeanna]

@Jeanna

So i guess you are not going to try like i told you.

I just got up, for crying out loud.
I just looked and replied to Altrez.
I have not even begun the day.
Breakfast dishes are still on my lap.

And, exactly what was it you told me?

I need to review the last day's posts to find out. I am sure it will come back to me.

You are not wasting your time if someone who is not posting sees and makes some headway by a constructive comment you make.

jeanna

[Mk1]

@Jeanna


Come on Jeanna , Use a pot then worry about the consumption , you need to know what your toroid can give with each different modification you make
that way , you are not going to see the power range on the big one ,based on what i have seen it like working slow .

Mark

Sorry , i guess i get excited since i still have so much to show , and less time to get my point across. Don't take it so personally.

[jeanna]

@Bill,
You will like this one.
@All,
The primary on this Joule thief is 360 turns. WireA is copper, wire B is iron. I have connected the end of one to the beginning of the other and twisted them and put the twisted pair into the pos rail.
The battery is 1.2v
The secondary (unknown number scramblewound) reads
3.63volts at 41.6 KHz ... Interesting frequency ...I wonder if you could crack water with this and burn a brighter light and maybe heat your house?  ).

Notice the BJTLed is on and there is no need for a cap at the base resistor.
Without the BJTL the voltage is
10.73v and the frequency is
57.1KHz

ooo, I like this!

1k ohm resistor
2N3904

Notice the upward and downward peaks. Some have 3 to 4 waves bunched together before going on to a smoother continuation.  I didn't get any closer than this. they go off the screen.

jeanna

[jeanna]

@Jeanna
Come on Jeanna , Use a pot then worry about the consumption ,...

I asked you a question yesterday about power output not consumption.

I lost over half the expected power by connecting these in series.
In one way to connect them I lost 88% of the expected power.
I am wanting to know why this is.

I know how to tune it with a pot, I want to know about the power output changing so dramatically. It does this all the time.

I suspect there is on enormous spike that your cap is picking up that is so skinny my scope won't.
But, I cannot say this. I cannot replicate your power output on both sides.
I can on one side but not when I put them together.

This was and still is my question.

I think 275V is pretty strong for one half of the secondary winding.
I have 2 halves like that if I use a certain resistor, so I am not concerned about getting the biggest output. I am concerned about what happens when they are added together?

I think theNOP has been hinting at this when he explains the inductor as resistor, but again, I am not quite sure how it applies here. One half meets the other and sees another different inductor and that is like a resistor. It does that because it is built on a toroid and the mag field is going in the opposite direction for the moment the additional pickup is added.

But then Hazens or slayer's with the pickup wound all the way and back again cuts the output down too.

jeanna